Assigitos to s



Feb. 27,1923. 1,446,92

J. H. HUNT ELECTRICAL CONTROLLING SYSTEM Filed May 21, 1921 A 0 1 whom may comes-*9:

it 1 2110 .121 that I, 30.5w HUNT, a, sitizen of t 2e Unitei S mies of Bun-rim, residi g at D ymn, county of fioltgome State of Uhio; have; invented certain new and. usemprov-emel 3 in lee-alien? Conn-oiling Say-stairs of wn h the following i*- n if iebutz'iual control by means W115 (me machanicai meinbax' may be czl ilS-i t a '11 synchronism with another mov i her, and the invention is purtimu fall in connection with synchranizing 1:, a cnixs gun Wit-h an airplane 81 11c 50 thn bjcci 0 Pi'O-Viiid 113111;; the 0 gun mu":

lag is rev is cleafly shown. In like drawings:

Fig. 1 shows diagmmmmbczaly z.-

View of an engin and machine gin t0 which a synchronize? embodying tha' inventic'n is applied; and

Fig. 2 is a Wiring diagwam showin diagmmmaficaiiy the essentizai elements of the synchronizing apparatus.

In the drawings tha propeller 21 a and. leslgzmtes fbile muchme gun imvl i 214: L arranged to di ylzme oi e propefler. 1. hugger in or 21m 60 the disc zz includes k can! -25 136. This connectiml provide tion be'iwean the Chill 451111;? the weights move outwmd i; 23G flu'oug'h can "'1 i A 6 connecting i wim v 8 ti *1 1 "0 CfiHSE the main?!) 1 m1 shown in whez f shaft 36 diminishes. 16

62111155 is prcvided X -29 which are symme Thes lobes mdpemie J. ontaci" am; 53, respeoiiW-iy. Emma 53 ccepeimie wieh I 152105" 5% 55 resnecmvely.

I serve normafiy w mmm-m "ageinent. The a'nialure iile-l with the ontacts 513 and i Eenser U s ronnected in tarts and at by reason ground connection T71. All of this i mechanism described may be suitably housed within a timer housing T3, and mini-e the ma: hine gun 23 is electrically conn cted with the en and-magneto by viriu ol' its mocha! ical connection therewith, only one wire. he wire in. necessarv to 'l the timer apparatus with the trip; ger motor 95,

furrow so des" Hates the direction at ro A nation of the propeller. 'lhe diagrammatie Iew oi the magneto and timer shown in 2 is taken in the dirertion ot the arrow l oi hie. l hence the, arrow 8?) designates the direction ol' rotation of the magneto 21L; armature shal't till.

The magneto 2:2 is so timed with relation (Hill I me that the peak of the current wave wili occur several degrees of orank shalt rotation after one ol the blades ol 4!} propeller 21 ha moved out 'ol alignment with the an in rule Z-i. When the pealc ol the current wave in the armature eoil 215 i ached. the an 'ature core I?" will he apm l cl v in ihe position shown in Fig. time the cam will engage I11 530 to separate the contacts The separation at these conae short circuit of the mag" neio armature winding, 1L1 hence the ener omeq'nct w iuding 22% to elirinaiure 2t) and in ol' the gun 23. life re a i is connected wiih the ionia nei winding as through the lol lowingcircui winding 35. wire (31. slip r g fl? hr: i 3. wire (37 contacts 513. hreaher wire as. magnet, ground (=0 to mag- V Litiu'e winding 3.). i 0314"! 'e limit the time during which at winding 2% is energizeih ni operate upon the brealier the rontaets 5L and fi-lhave i fheii contacts 53 and 55 5o oi this winding will he suddenly disehargeil ei-e371 lure \vindin $1.3 to the ma 'nel. windin 'lhereljore it is not necessary to wait until the current in magneto armature winding 235 diminishes to zero before the electromagnet winding 2h will he deenergized. 'lherel'oro the armature 2S7 controlling the release of the firing pin can return to tiring pin retaining position before the breaker arm no is again operated on by one of the lobes. of the earn.

liy providing the speed responsive mechanism for advancing the cam 45 with respect to the shal't 36. the range of operation ol the machine gun measured in degrees of propeller rotalioin can be limited to :1V relatively small value. 'lherel'ore as regards the liability ol' a bullet striking one of the propeller blades, a. greater degree of salety can he maintained.

\Yhile the term ol mechanism 'herein shown and deserihed constitutes a preferred form of embodiment of the invention, it is to he understood that other forms might be mature winding, of an electromagnet and an armature operated thereby; means operating in synehronism with said armature to ellectdischarges of current from said magneto armature winding through said magnet in recurrent sequence; and means for determining the duration of said discharges whereby said (lBCtl'OlHtlgllOt will he deenergi'lied at a predetermined time.

2. In a System ol electrical eontroh the combination with a magneto havingan ar mature windingwt an eliartromagnet and an armature operated thereby; means operating" in synchronisin with said armature to eliect diseharges of current, from said magneto armature winding through said magnet in recurrent sequence; and a circuit breaker operating in synchronism with said magneto armature loidisconnecting said el(('li'()li.zljil0l1 from said magneto armature al'ter said discharges have continued lo! a redetermined. period.

1%. in a system of electrical control. the conihination with a magneto having an armature win' ing; of an eha-tromagnel and an armature operated thereby; means tor connecting said eleetnnnagnct with said magneto armature including: a circuit lHlZllfll'; a second circuit breaker for normallyshortcircuitin; said magnetoarmatnre winding: and means operatin in syncln'onisiu with said magneto for operating said lirealrez's in recurrent sequence, said first lirealcer opening after the second breaker hasopenerl eeann to determine the period of discharge from said magneto armature to said electromagnet.

4. In a system of electrical control, the

combination with a bipolar magneto having a two-pole armature including a Winding; of an electromagnet and an armature operated thereby; means for connecting said ma neto armature with said electromagnetinc uding a circuit breaker means normally short-circuiting said magneto armature Winding including a circuit breaker; and a symmetrical two lobe cam operating in synchronism with said magneto arn'iature intermittently to open said breakers in recurrent sequence, the relation of the breakers to the cam being such that the first mentioned breaker is opened a predetermined time after the second breaker is opened.

- 5. In a system of electrical control, the combination with a magneto having an armature winding, of an electromagnet and an armature operated thereby; means operating in synchronism with said armature to efiect discharges of current from said magneto armature winding through said magnet in recurrent sequence; means for determining the duration of said discharges whereby said electromagnet will deen gized at a predetermined time; and means for advancing the Iime of operation of said. magnet controlling means wirh increase in speed of rotation of the magneto.

6. In a system of electrical control, the combination with a magneto having an armature Winding, of an electromagnet and an armature operated thereby; means for connecting said electromagnet with said magneto armature including a circuit breaker, a second circuit breaker for normally shortcircuiting said magneto armature Winding; means operating in synchrcnism with said magneto for operating said breakers in recurrent sequence, said first breaker opening after the second breaker has opened to determine the period of discharge from said magneto armature to said electromagnet; and means for advancing the time of operation of said magnet controlling means with increase in speed of rotation of she magneto.

in testimony whereoi l5 hereto arhz in signature J HUB- l r lemons. 

